Knowledge and timber shouldn't be much used till they are seasoned.

The only condition of peace in this world is to have no ideas, or, at least not to express them.

On every stem, on every leaf,... and at the root of everything that grew, was a professional specialist in the shape of grub, caterpillar, aphis, or other expert, whose business it was to devour that particular part.

To have doubted one's own first principles is the mark of a civilized man.

There is nothing earthly that lasts so well, as money. A man's learning dies with him, as does his virtues fade out of remembrance, but the dividends on the stocks he bequeaths to his children live and keep his memory green.

Any tax is a discouragement and therefore a regulation so far as it goes.

Who does not feel that Nansen's account of his search for the Pole rather loses than gains in ideal satisfaction by the pretense of a few trifling acquisitions for science?